source/gnulinker.cpp

   1 #include <stdexcept>
   2 #include <vector>
   3 #include <msp/fs/dir.h>
   4 #include <msp/fs/utils.h>
   5 #include <msp/strings/format.h>
   6 #include "builder.h"
   7 #include "component.h"
   8 #include "executable.h"
   9 #include "externaltask.h"
  10 #include "gnucompiler.h"
  11 #include "gnulinker.h"
  12 #include "objectfile.h"
  13 #include "sharedlibrary.h"
  14 #include "sourcepackage.h"
  15 #include "staticlibrary.h"
  16
  17 using namespace std;
  18 using namespace Msp;
  19
  20 GnuLinker::GnuLinker(Builder &b, const Architecture &a):
  21         Tool(b, a, "LINK")
  22 {
  23         input_suffixes.push_back(".o");
  24         input_suffixes.push_back(".a");
  25
  26         if(architecture->is_native())
  27         {
  28                 system_path.push_back("/lib");
  29                 system_path.push_back("/usr/lib");
  30                 if(architecture->match_name("pc-32-linux"))
  31                         system_path.push_back("/usr/lib/i386-linux-gnu");
  32                 else if(architecture->match_name("pc-64-linux"))
  33                         system_path.push_back("/usr/lib/x86_64-linux-gnu");
  34         }
  35         else
  36                 system_path.push_back("/usr/"+architecture->get_cross_prefix()+"/lib");
  37
  38         default_linker = new Linker(*this, "CC");
  39         cxx_linker = new Linker(*this, "CXX");
  40 }
  41
  42 GnuLinker::~GnuLinker()
  43 {
  44         delete default_linker;
  45         delete cxx_linker;
  46 }
  47
  48 Target *GnuLinker::create_target(const list<Target *> &sources, const string &arg) const
  49 {
  50         if(sources.empty())
  51                 throw invalid_argument("GnuLinker::create_target");
  52         list<ObjectFile *> objs;
  53         Linker *linker = default_linker;
  54         for(list<Target *>::const_iterator i=sources.begin(); i!=sources.end(); ++i)
  55         {
  56                 if(ObjectFile *obj = dynamic_cast<ObjectFile *>(*i))
  57                 {
  58                         objs.push_back(obj);
  59                         if(obj->get_tool()->get_tag()=="CXX")
  60                                 linker = cxx_linker;
  61                 }
  62                 else
  63                         throw invalid_argument("GnuLinker::create_target");
  64         }
  65
  66         const Component &comp = objs.front()->get_component();
  67         Binary *bin = 0;
  68         if(arg=="shared")
  69                 bin = new SharedLibrary(builder, comp, objs);
  70         else
  71                 bin = new Executable(builder, comp, objs);
  72         bin->set_tool(*linker);
  73         return bin;
  74 }
  75
  76 Task *GnuLinker::run(const Target &) const
  77 {
  78         throw logic_error("GnuLinker should not be run directly");
  79 }
  80
  81
  82 GnuLinker::Linker::Linker(GnuLinker &p, const string &compiler_tag):
  83         SubTool(p)
  84 {
  85         const Tool &compiler = builder.get_toolchain().get_tool(compiler_tag);
  86         if(dynamic_cast<const GnuCompiler *>(&compiler))
  87                 executable = compiler.get_executable();
  88         else
  89         {
  90                 string command;
  91                 if(compiler_tag=="CC")
  92                         command = "gcc";
  93                 else if(compiler_tag=="CXX")
  94                         command = "g++";
  95                 else
  96                         throw invalid_argument("GnuLinker::Linker::Linker");
  97                 if(architecture->is_cross())
  98                         command = format("%s-%s", architecture->get_cross_prefix(), command);
  99                 executable = builder.get_vfs().find_binary(command);
 100         }
 101 }
 102
 103 Target *GnuLinker::Linker::create_target(const list<Target *> &sources, const string &arg) const
 104 {
 105         return parent.create_target(sources, arg);
 106 }
 107
 108 Task *GnuLinker::Linker::run(const Target &target) const
 109 {
 110         const Binary &bin = dynamic_cast<const Binary &>(target);
 111
 112         vector<string> argv;
 113         argv.push_back(executable->get_path().str());
 114
 115         const Component &comp = *bin.get_component();
 116
 117         if(const SharedLibrary *shlib = dynamic_cast<const SharedLibrary *>(&bin))
 118         {
 119                 argv.push_back("-shared");
 120                 argv.push_back("-fPIC");
 121                 if(!shlib->get_soname().empty())
 122                         argv.push_back("-Wl,-soname,"+shlib->get_soname());
 123         }
 124         else if(comp.get_package().get_library_mode()==ALL_STATIC)
 125                 argv.push_back("-static");
 126
 127         const BuildInfo &binfo = comp.get_build_info();
 128         for(BuildInfo::PathList::const_iterator i=binfo.libpath.begin(); i!=binfo.libpath.end(); ++i)
 129                 argv.push_back("-L"+i->str());
 130         if(binfo.strip)
 131                 argv.push_back("-s");
 132         if(binfo.threads)
 133                 argv.push_back("-pthread");
 134
 135         const Architecture &native_arch = builder.get_native_arch();
 136         if(architecture->get_bits()!=native_arch.get_bits())
 137                 argv.push_back(format("-m%d", architecture->get_bits()));
 138
 139         FS::Path work_dir = comp.get_package().get_source();
 140
 141         argv.push_back("-o");
 142         argv.push_back(relative(bin.get_path(), work_dir).str());
 143
 144         const Target::Dependencies &depends = target.get_depends();
 145         for(Target::Dependencies::const_iterator i=depends.begin(); i!=depends.end(); ++i)
 146         {
 147                 Target *tgt = (*i)->get_real_target();
 148
 149                 if(ObjectFile *obj = dynamic_cast<ObjectFile *>(tgt))
 150                         argv.push_back(relative(obj->get_path(), work_dir).str());
 151                 else if(StaticLibrary *stlib = dynamic_cast<StaticLibrary *>(tgt))
 152                         argv.push_back(stlib->get_path().str());
 153                 else if(SharedLibrary *shlib = dynamic_cast<SharedLibrary *>(tgt))
 154                         argv.push_back("-l"+shlib->get_libname());
 155         }
 156
 157         if(!builder.get_dry_run())
 158                 FS::mkpath(FS::dirname(bin.get_path()), 0755);
 159
 160         return new ExternalTask(argv, work_dir);
 161 }